Honeywell 51370B Manal page 15

Venting continued-
Terminating
Through the Wall
Through the Wall
Through the Wall
Through the Wall
Through the Wall
Through the Roof
Through the Roof
Through the Roof
Through the Roof
Through the Roof
NOTE: When using 4" (10.2 cm) vent pipe, use two 4" (10.1 cm) to 3" (7.6
cm) reducers for each portion of the vent. One reducer is installed just
after the blower and the other reducer is used just prior to exiting the
building. Exit the building wall with 3" (7.6 cm) vent pipe using the 3"
(7.6 cm) 90 vent terminal supplied. Two 45 elbows are equivalent to one
90 elbow.
All of the Venting connections must be leak checked with a soap and
water solution upon initial startup of the water heater. Any leaks must
be repaired before continuing operation of the water heater.
TABLE 2 -VENT CONNECTOR LENGTHS
FOR 4" (10.2 cm) DIAMETER VENT PIPE
# of 90
Elbows (excl.
vent term.)
1
2
3
4
5
0
1
2
3
4
IMPORTANT
Maximum straight
Length ft. (m)
95 (29.0)
90 (27.4)
85 (25.9)
80 (24.4)
75 (22.9)
100 (30.5)
95 (29.0)
90 (27.4)
85 (25.9)
80 (24.4)
Figure 2
15
75 gal.
Min
straight
Length
ft. (m)
10 (3.1)
10 (3.1)
10 (3.1)
10 (3.1)
10 (3.1)
15 (4.6)
15 (4.6)
15 (4.6)
15 (4.6)
15 (4.6)